.kv-header{position:sticky;top:0;z-index:40;background:rgba(8,12,8,0.96);backdrop-filter:blur(18px);border-bottom:1px solid rgba(85,239,124,0.28)}.kv-header__inner{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;gap:var(--space-8)}.kv-header__brand{display:inline-flex;align-items:center;gap:var(--space-6);color:var(--color-text)}.kv-header__brand:is(:hover,:focus-visible){color:var(--color-primary)}.kv-header__brand-mark{width:32px;height:32px;border-radius:10px;border:1px solid rgba(85,239,124,0.6);box-shadow:0 0 18px rgba(85,239,124,0.45);background:radial-gradient(circle at 30% 10%,rgba(85,239,124,0.9),transparent 55%),radial-gradient(circle at 80% 90%,rgba(8,12,8,1),rgba(20,31,20,1))}.kv-header__brand-text{display:flex;flex-direction:column;line-height:1.1}.kv-header__brand-name{font-family:var(--font-display);font-size:var(--font-size-lg);letter-spacing:0.18em;text-transform:uppercase}.kv-header__brand-tagline{font-family:var(--font-mono);font-size:var(--font-size-xs);letter-spacing:0.16em;text-transform:uppercase;color:var(--gray-400)}.kv-header__nav{position:relative}.kv-header__nav-list{display:flex;align-items:center;gap:var(--space-6);font-size:var(--font-size-sm)}.kv-header__nav-link{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border-radius:var(--radius-pill);color:var(--gray-200);font-family:var(--font-mono);font-size:var(--font-size-xs);letter-spacing:0.16em;text-transform:uppercase}.kv-header__nav-link::before{content:"";width:6px;height:6px;border-radius:999px;background-color:rgba(85,239,124,0.35);box-shadow:0 0 0 1px rgba(85,239,124,0.3);transition:background-color var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast)}.kv-header__nav-link:is(:hover,:focus-visible){color:var(--color-primary);background:rgba(20,31,20,0.9)}.kv-header__nav-link:is(:hover,:focus-visible)::before{background-color:var(--color-primary);box-shadow:0 0 12px rgba(85,239,124,0.8);transform:scale(1.2)}.kv-header__nav-item--cta .kv-header__nav-link{padding-inline:16px}.kv-header__nav-link--cta{font-size:var(--font-size-xs);letter-spacing:0.16em;text-transform:uppercase}.kv-header__toggle{margin-left:auto}@media (min-width:900px){.kv-header__toggle{display:none}.kv-header__nav-list{position:static;flex-direction:row;background:none;padding:0;border-radius:0;box-shadow:none}}@media (max-width:899.98px){.kv-header__nav{position:fixed;inset:var(--header-height) 0 auto 0;z-index:30;pointer-events:none}.kv-header__nav-list{flex-direction:column;align-items:flex-start;padding:var(--space-12);margin:0 var(--space-8) var(--space-12);border-radius:var(--radius-lg);border:1px solid rgba(85,239,124,0.32);background:radial-gradient(circle at 0 0,rgba(85,239,124,0.16),transparent 60%),rgba(8,12,8,0.98);box-shadow:var(--shadow-strong);transform-origin:top center;transform:scaleY(0.96) translateY(-8px);opacity:0;visibility:hidden;transition:opacity var(--transition-mid),transform var(--transition-mid),visibility var(--transition-mid)}.kv-header__nav--open{pointer-events:auto}.kv-header__nav--open .kv-header__nav-list{opacity:1;visibility:visible;transform:scaleY(1) translateY(0)}.kv-header__nav-item{width:100%}.kv-header__nav-link{width:100%;justify-content:flex-start}}.kv-header__nav-overlay{position:fixed;inset:var(--header-height) 0 0 0;background:radial-gradient(circle at 0 0,rgba(85,239,124,0.15),transparent 55%),rgba(0,0,0,0.72);backdrop-filter:blur(10px);opacity:0;pointer-events:none;transition:opacity var(--transition-mid);z-index:20}.kv-header__nav-overlay--visible{opacity:1;pointer-events:auto}.kv-header__nav-overlay-button{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent;cursor:pointer}